Wood-boring machine



No Model. H. IHSEN.

WOOD BORING MACHINE.

No. 374,363. Patented Dec. 6, 1887.

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UNKTED STATES PATENT OFFICE.

HENRY IHSEN, OF ALLEGHENY CITY, PENNSYLVANIA.

WOOD-BORING MACHINE.

SPECIFICATION forming part of Letters Patent No. 374,363, dated December6, 1887.

Application filed January 19, 1886, Serial No. 189.046. (No model.)

To aZZ whom, it may concern.-

Be it known that I, HENRY IHsEN, of Allegheny City, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in vVood-Boring Machines; and I do hereby declare thefollowing to be a full, clear, and exact description thereof.

My invention relates to certain improvements in wood'boring machines,being applicable especially to the boring-machines shown and'describedin Letters Patent No. 296,093, granted to Z. G. Phillips April 1,1884,though it may be used with advantage in any of the ordinaryboring-machines heretofore in use. In the Phillips patent is shown anddescribed a hollow auger-shaft mounted within the sliding frame of theboringmachine, through which hollow shaft the shank of the ordinaryauger extends, the shank being centered and held in place by set-screwswhich pass through the auger-shaft and engage with the cylindricalportion of the auger-shank, the boringmachine being by this meansadapted to receive angers having shanks of any size or shape. This hasbeen found a very great improvement in connection with boring-machines;but difficulty has been experienced in centering the auger-shank withinthe hollow shaft, a very delicate adjustment of the set-screws passingthrough the shaft being necessary for this purpose.

The particular object of my invention is to overcome these difficultiesin connection with this class of boring-machines, as will be hereinaftermore specifically set forth.

It consists, generally, in ahollow auger shaft or spindle adapted toreceive the cylindrical part of the auger-shank and provided withcentering pins projecting into said spindle through the side walls ofthe same,and a sleeve having inclined inner walls fitting over saidspindle and bearing on the heads of the pins, by means of which theaugershank may be centered or brought to the exact position desiredwithin the shaft or spindle without any particular adjustment thereof,and be firmly held within said shaft or spindle when in use.

In the accompanying drawings, illustrating my invention, Figure 1 is avertical central section thereof, showing the auger and its shank infull lines. Fig. 2 is an enlarged longitudinal section of the chuck andhollow auger-shaft, and Fig. 3 is an enlarged view showing a portion ofthe body and slidlng frame of the machine and illustrating the samewhere the hollow auger-shaft is done away with.

Like letters of reference indicate like parts in each.

In the drawings, a represents the ordinary bed-frame, at one end ofwhich are pivoted the standards I) b of the vertical frame or body I) ofthe boringmachine, these standards being connected by any cross-braces,as at b If.

At the base of the bed-frame is secured the quadrant c, this quadrantbeing secured firmly to the bed-frame, so forming a stationary quadrant,and the quadrant having a supportingstrap extending back of the frame,as at (Z, and secured to the end of the bed-frame, as at d. The quadrantc is provided with the slot 0, within which set-screws on the standardsI) I) travel, and by means of which the frame is adjusted to theparticular angle at which the hole is to be bored by the auger. By thisconstruction the apparatus for adjusting the vertical frame is muchsimplified, and at the same time it is rendered strong and firm, so asto withstand any pressure or strain brought upon the vertical frame.

Sliding within the frame I) is the sliding framef, within whichthe'power apparatus of the machine is mounted, this frame being of anydesired construction suitable for the purpose and having mounted at ornear thetop thereof the horizontal crank-shaft g, by means of whichpower is applied to the auger-shaft, this crank-shaft carrying thebeveled miterwheel 72, which engages with beveled miterwheel h, which inthe construction preferred by me is mounted at the upper end of thehollow auger-shaft it, this hollow augershaft being mounted in suitablebearings, ff, in the center of the sliding frame. The augershaft 7c ispreferably formed hollow throughout its length,so as to arrange theapparatus for supporting a long augershank, which will pass through theauger-shaft and extend above the machine, the top brace,f ,of thesliding frame, as well as thenpper cross-piece, 12 of the stationaryframe,having openings formed therein to receive the end of the shaft. Insome cases, however, this may not be necessary and the upper end of thehollow auger-shaft may be IOO closed, the shaft being adapted to receiveaugers of the ordinary length.

At the base of the hollow auger-shaft is the centering-chuck, as at Z,this chuck being adapted to engage with the cylindrical portion of theauger-shank and center the same exactly within the hollow shaft orspindle, so that after the auger'shank has bee-n inserted within theshaft by means of the chuck it can be centered and held therein, therebeing no necessity for special adjustment of the setscrews in order tocause the perfect working of the auger when connected to theboringmachine. The construction of this chuck preferred by me is shownin the drawings, the 1101- low auger shaft or spindle having theenlarged portion a, through which are formed three or more radial holesor seats to receive the pins or bits 1), these pins extending into thehollow auger shaft or spindle and some distance out beyond theenlargement thereof.

Below the enlargement on the shaft or spin- I die isformed the threadedportion 1,011 which is screwed thesleeve .9, this sleeve having theannular beveled inner face or wall, t, which presses against the outerends of the pins 17, and so forces them inwardly, causing the inner endsor points, 12, of the pins to engage with the auger-shank at wheninserted within the hollow shaft or spindle, the sleeve 8 beinggradually screwed up and gradually forcing in these pins, so that they,bring the augershank to the center of the hollow shaft or spindle andhold the same there firmly, thus centering the shank and overcoming anyneces sity for particular adjustment by means of such screws orbolts ofthe shank within the hollow shaft. The sleeve 3 is either formed a11-gular on its outer face to engage with a wrench, or is provided withholes, as at s, by means of which any suitable tool may be caused toengage with the sleeve and hold it firmly while the shaft is rotated, orturn it while the shaft is held from rotation by means of thecrankshaft.

For general purposes of the machine I find it necessary to employ onlyone centeringchuck at the base of the hollow shaft, the hollow shaftextending up through the bearings f'f, and having secured at the topthereof the miter-wheel h, before referred to, and when this hollowshaft is opened throughout its length, in order to arrange for holdingangers having long shanks, I generally prefer to form the crankshaft ona different vertical plane from the augershaft and make the miter-wheelsh 7/ what are termed screw-miters, as shown inthe Phillips patent. Itmay be desirable to employ an additional chuck on the hollow shaft, asshown in Fig. 1, this chuck being generally located below the bearingfof the sliding frame, and the two chucks in combination acting to holdthe auger-shank from any swinging motion whatever.

Instead of the employment of the hollow auger-shaft, as shown in Figs. 1and 2, I may employ the hollow spindles, as shown in Fig.

3, one spindle being mounted in the lower bearing, f, on the slidingframe and having a chuck at the base thereof,and another spindle beingmounted in the central cross-brace, f, of the sliding frame and carryingthe miterwheel h, and also having a chuck secured thereto below thebearing, and when the anger-shaft is inserted through these spindles andfirmly secured thereto by means of the centeringchucks, as abovedescribed, it is evident that the motion will be imparted to theauger-shank from the bevel-gear through the upper spindle, and thenecessity of employing a hollow anger-shaft is overcome, the lowerspindle acting to center the lower end of the shank and prevent swingingor side movement thereof.

WVhen my improved boring-machine is in use, the operator, by means ofthe stationary quadrant and set-screws above referred to, adjusts thebody b to the desired angle, and he then inserts the auger intended tobe used, and if this auger has a long shank, as shown, it passes upthrough the hollow auger-shaft k, or the spindles in the bearings,and isadjusted to its proper position with relation to the sliding frame, andthe sleeve 8 of the chuck is then caught by means of awrench, while thehollow shaft is turned by means of the crank-shaft and gearing, thesleeves being thus screwed up on thehollowshaft and the pins ofthe chuckforced in upon the cylindrical portion of the auger- -shank, the pinsacting, as before described,

' adjustment required in holding shanks of different sizes within thesame boring-machine and provide means for firmly securing shanks of anysize without any adjustment therefor.

The form of chuck employed is simple in construction and cheap, and itmay be applied to advantage to other forms of boring or turning machinesthan that shown.

\Vhat I claim as my invention, and desire to secure by Letters Patent,is-

Ina woodboring machine, the combination, with the sliding frame, ofahollow auger-spindle mounted thereon, centeringpins projecting looselyinto said hollow spindle through the walls thereof, and a movable sleevehaving annular beveled inner'walls fitting over said spindle and bearingon the heads of the pins, substantially as and for the purpose setforth.

In testimony whereof I, the said HENRY IHsEN, have hereunto set my hand.

HENRY II-ISEN.

\Vitnesses:

Mason V. DAVID, JAMES I. KAY.

